i get young birds sickness every year in april so thought i would give permitherin a bash. I sprayed loft, baskets,hoppers and even the ybirds when they were weened and i thought ive cracked it this year but hay hoo 28th april the 1st signs started to appear by the weekend it was full blown YBS. On the plus side ive not got any moths or beasties in the the loft or on the birds